Hi Goncalo

The issue, as I pointed out to you yesterday on Stan Discourse, is rstan (the 
interface to Stan via R).

And hence my advice to you there was to downgrade to Stan 2.19.3

It was not your Makevars file - although that was an incomplete Makevars you 
had if there were in fact no typos in your previous email.

As others have pointed out, a Makevars file is no longer necessary to run Stan 
if using MACOS X Catalina onwards.

Nor is the Renviron file.

Do not upgrade to any rstan higher than 2.19.3 until the rstan issues on 
various platforms are resolved.

Meanwhile, you can use, as is my preference, the CmdStan and cmdstanr interface 
to Stan instead of rstan, which …

(1) samples quite a bit faster than rstan

(2) is more up-to-date with Stan although with a few less features than rstan

http://mc-stan.org/cmdstanr/articles/cmdstanr.html

And if you are using the brms interface to Stan then it also has an option in 
the brm() function to use cmdstanr as the backend rather than rstan.

regards

Milani

____________________________________________________

Dr Milani Chaloupka
Ecological Modelling Services P/L
PO Box 6150, University of Queensland
St Lucia, Queensland, 4067, Australia

Honorary Associate Professor
School of Biological Sciences, University of Queensland
Brisbane, Queensland, 4072, Australia

Scientific Advisory Committee (Member)
Caribbean Conservation Corporation
Gainesville, Florida, USA

Science and Statistics Committee (Member)
Western Pacific Regional Fisheries Management Council
NOAA, US Dept of Commerce, Honolulu, Hawaii, USA

m.chalou...@uq.edu.au<mailto:m.chalou...@uq.edu.au>
mobile: (local) 0419180554  (international) + 61 419180554
skype: milani2005
____________________________________________________


On 10 Nov 2020, at 6:03 am, Goncalo Ferraz via R-SIG-Mac 
<r-sig-mac@r-project.org<mailto:r-sig-mac@r-project.org>> wrote:

Hi, This is helpful information. Thank you. Meanwhile, I tried reverting to 
version 2.19.3 of rstan and it does not hang on me. I couldn’t yet understand 
what is going on with the most recent version, but at least for now I can work.

Gonçalo

On Nov 9, 2020, at 5:00 PM, Robert Goedman 
<goed...@icloud.com<mailto:goed...@icloud.com>> wrote:

Hi,

Not sure if this helps and/or is even related but since about 2 months I have 
not been able to get rstan to work inside the R-GUI. Like you describe, it 
hangs and never returns. I don’t use rstan directly but use ulam() in the 
`rethinking` package to very occasionally check the Stan language program 
generated by ulam() after running it.



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